Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments - Schedule of Quantitative Information of Fair Value Measurements (Details)

v3.24.0.1
Fair Value of Financial Instruments - Schedule of Quantitative Information of Fair Value Measurements (Details) - Significant Unobservable Inputs (Level 3)
$ in Thousands
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 3,057,299 $ 2,795,444
Equity and Warrant Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 116,916 85,966
Debt Investments And Other Investment Receivables    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 3,066,947  
Market Comparable Companies | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 52,094 30,086
Market Comparable Companies | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 19,014 12,479
Market Comparable Companies | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 971,775 903,427
Market Comparable Companies | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 1,181,823 967,108
Market Comparable Companies | Sustainable and Renewable Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 1,678 3,006
Market Comparable Companies | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 322,162 $ 328,393
Market Comparable Companies | Hypothetical Market Yield | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1503  
Market Comparable Companies | Premium/(Discount) | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.0020
Market Comparable Companies | Minimum | Hypothetical Market Yield | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1091 0.1174
Market Comparable Companies | Minimum | Hypothetical Market Yield | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1130 0.1205
Market Comparable Companies | Minimum | Hypothetical Market Yield | Sustainable and Renewable Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1075 0.1471
Market Comparable Companies | Minimum | Hypothetical Market Yield | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1254 0.1368
Market Comparable Companies | Minimum | Premium/(Discount) | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input (0.0100) (0.0075)
Market Comparable Companies | Minimum | Premium/(Discount) | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input (0.0100) (0.0100)
Market Comparable Companies | Minimum | Premium/(Discount) | Sustainable and Renewable Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0075 0.0075
Market Comparable Companies | Minimum | Premium/(Discount) | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input (0.0075) (0.0200)
Market Comparable Companies | Minimum | EBITDA Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 12.3 12.4
Market Comparable Companies | Minimum | EBITDA Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 12.3 12.4
Market Comparable Companies | Minimum | Revenue Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3 0.7
Market Comparable Companies | Minimum | Revenue Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.9 0.6
Market Comparable Companies | Minimum | Tangible Book Value Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 1.8 1.6
Market Comparable Companies | Minimum | Discount for Lack of Marketability | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0711 0.0811
Market Comparable Companies | Minimum | Discount for Lack of Marketability | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0621 0.0811
Market Comparable Companies | Maximum | Hypothetical Market Yield | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.2143 0.1904
Market Comparable Companies | Maximum | Hypothetical Market Yield | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.2074 0.1853
Market Comparable Companies | Maximum | Hypothetical Market Yield | Sustainable and Renewable Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1075 0.1471
Market Comparable Companies | Maximum | Hypothetical Market Yield | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.2015 0.1849
Market Comparable Companies | Maximum | Premium/(Discount) | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0350 0.0175
Market Comparable Companies | Maximum | Premium/(Discount) | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0500 0.0150
Market Comparable Companies | Maximum | Premium/(Discount) | Sustainable and Renewable Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0075 0.0075
Market Comparable Companies | Maximum | Premium/(Discount) | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0225 0.0075
Market Comparable Companies | Maximum | EBITDA Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 12.3 12.4
Market Comparable Companies | Maximum | EBITDA Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 12.3 12.4
Market Comparable Companies | Maximum | Revenue Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 20.1 16.1
Market Comparable Companies | Maximum | Revenue Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 10.2 8.8
Market Comparable Companies | Maximum | Tangible Book Value Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 1.8 1.6
Market Comparable Companies | Maximum | Discount for Lack of Marketability | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.9272 0.2890
Market Comparable Companies | Maximum | Discount for Lack of Marketability | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3312 0.3270
Market Comparable Companies | Weighted Average | Hypothetical Market Yield | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1346 0.1517
Market Comparable Companies | Weighted Average | Hypothetical Market Yield | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.1521
Market Comparable Companies | Weighted Average | Hypothetical Market Yield | Sustainable and Renewable Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1075 0.1471
Market Comparable Companies | Weighted Average | Hypothetical Market Yield | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1413 0.1482
Market Comparable Companies | Weighted Average | Premium/(Discount) | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0004 0.0001
Market Comparable Companies | Weighted Average | Premium/(Discount) | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0047  
Market Comparable Companies | Weighted Average | Premium/(Discount) | Sustainable and Renewable Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0075 0.0075
Market Comparable Companies | Weighted Average | Premium/(Discount) | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0056 (0.0043)
Market Comparable Companies | Weighted Average | EBITDA Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 12.3 12.4
Market Comparable Companies | Weighted Average | EBITDA Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 12.3 12.4
Market Comparable Companies | Weighted Average | Revenue Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 7.2 7.4
Market Comparable Companies | Weighted Average | Revenue Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 4.2 3.4
Market Comparable Companies | Weighted Average | Tangible Book Value Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 1.8 1.6
Market Comparable Companies | Weighted Average | Discount for Lack of Marketability | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3157 0.1979
Market Comparable Companies | Weighted Average | Discount for Lack of Marketability | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.2170 0.1897
Income Approach | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 23,244 $ 20,356
Income Approach | Minimum | Probability weighting of alternative outcomes | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0100 0.0100
Income Approach | Maximum | Probability weighting of alternative outcomes | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.5000 0.5000
Income Approach | Weighted Average | Probability weighting of alternative outcomes | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3932 0.3579
Liquidation | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments   $ 0
Liquidation | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments   0
Liquidation | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 8,455  
Liquidation | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 0 1,671
Liquidation | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments   $ 8,042
Liquidation | Other Investment Receivable | Other Investment Receivables    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 9,648  
Liquidation | Minimum | Probability weighting of alternative outcomes | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1000  
Liquidation | Minimum | Probability weighting of alternative outcomes | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 1.0000 0.0500
Liquidation | Minimum | Probability weighting of alternative outcomes | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.2000
Liquidation | Minimum | Probability weighting of alternative outcomes | Other Investment Receivable | Other Investment Receivables    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1000  
Liquidation | Minimum | Revenue Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   2.1
Liquidation | Minimum | Revenue Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   6.2
Liquidation | Minimum | Discount for Lack of Marketability | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.8500
Liquidation | Minimum | Discount for Lack of Marketability | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   90.00
Liquidation | Maximum | Probability weighting of alternative outcomes | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.5000  
Liquidation | Maximum | Probability weighting of alternative outcomes | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 1.0000 0.8000
Liquidation | Maximum | Probability weighting of alternative outcomes | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.8000
Liquidation | Maximum | Probability weighting of alternative outcomes | Other Investment Receivable | Other Investment Receivables    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.5000  
Liquidation | Maximum | Revenue Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   2.1
Liquidation | Maximum | Revenue Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   6.2
Liquidation | Maximum | Discount for Lack of Marketability | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.8500
Liquidation | Maximum | Discount for Lack of Marketability | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   90.00
Liquidation | Weighted Average | Probability weighting of alternative outcomes | Pharmaceuticals | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.4183  
Liquidation | Weighted Average | Probability weighting of alternative outcomes | Technology | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 1.0000 0.4829
Liquidation | Weighted Average | Probability weighting of alternative outcomes | Lower Middle Market | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.8000
Liquidation | Weighted Average | Probability weighting of alternative outcomes | Other Investment Receivable | Other Investment Receivables    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.4183  
Liquidation | Weighted Average | Revenue Multiple | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   2.1
Liquidation | Weighted Average | Revenue Multiple | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   6.2
Liquidation | Weighted Average | Discount for Lack of Marketability | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   0.8500
Liquidation | Weighted Average | Discount for Lack of Marketability | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input   90.00
Cost Approach | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 431,512 $ 392,168
Debt Investments Imminent Payoffs | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 54,430 77,676
Debt Maturing Within One Year | Debt Investments    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 62,220 93,597
Market Adjusted OPM Backsolve | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments 11,096 13,795
Market Adjusted OPM Backsolve | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 3,074 $ 6,934
Market Adjusted OPM Backsolve | Minimum | Market Equity Adjustment | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input (0.8614) (0.9782)
Market Adjusted OPM Backsolve | Minimum | Market Equity Adjustment | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input (0.7067) (0.9782)
Market Adjusted OPM Backsolve | Maximum | Market Equity Adjustment | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3269 0.1634
Market Adjusted OPM Backsolve | Maximum | Market Equity Adjustment | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3486 0.6643
Market Adjusted OPM Backsolve | Weighted Average | Market Equity Adjustment | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.0747 (0.1669)
Market Adjusted OPM Backsolve | Weighted Average | Market Equity Adjustment | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1317 (0.0886)
Discounted Cash Flow | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 28,713 $ 19,153
Discounted Cash Flow | Minimum | Discount Rate | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.1988 0.1772
Discounted Cash Flow | Maximum | Discount Rate | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3197 0.3013
Discounted Cash Flow | Weighted Average | Discount Rate | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investment company, investment owned, measurement input 0.3051 0.2446
Other | Equity Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 2,925 $ 3,513
Other | Warrants    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Investments $ 0 $ 6